:root {
  --bg: #08111f;
  --panel: #101c31;
  --panel-light: #16263f;
  --text: #f7fafc;
  --muted: #aab6c8;
  --accent: #76e4f7;
  --accent-2: #9f7aea;
  --border: rgba(255,255,255,.12);
  --shadow: 0 24px 70px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, rgba(118,228,247,.18), transparent 32%), var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(8,17,31,.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 900;
  letter-spacing: -.04em;
  font-size: 1.25rem;
}
.logo span { color: var(--accent); margin-left: 4px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: .95rem;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  color: var(--bg) !important;
  background: var(--accent);
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 800;
}
.menu-toggle { display: none; }

.hero {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 84px 0 60px;
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 32px;
  align-items: stretch;
}

.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .78rem;
  font-weight: 900;
  margin: 0 0 12px;
}

h1, h2, h3 { line-height: 1.08; margin: 0; letter-spacing: -.045em; }
h1 { font-size: clamp(2.8rem, 7vw, 5.9rem); max-width: 920px; }
h2 { font-size: clamp(2rem, 4vw, 3.4rem); }
h3 { font-size: 1.35rem; }

.hero-text {
  color: var(--muted);
  font-size: 1.18rem;
  max-width: 760px;
  margin: 24px 0 0;
}
.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 20px;
  border-radius: 999px;
  font-weight: 900;
  border: 1px solid var(--border);
}
.btn.primary { background: var(--accent); color: #06101d; }
.btn.secondary { color: var(--text); background: rgba(255,255,255,.06); }

.hero-card, .feature-post, .category-card, .post-card, .newsletter {
  background: linear-gradient(145deg, rgba(255,255,255,.08), rgba(255,255,255,.025));
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
}
.hero-card {
  padding: 30px;
  align-self: end;
}
.card-label, .tag {
  display: inline-block;
  color: var(--accent);
  font-weight: 900;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 14px;
}
.hero-card p { color: var(--muted); }
.hero-card a, .feature-post a, .post-card a { color: var(--accent); font-weight: 900; }

.featured-grid, .section, .newsletter, .footer {
  width: min(1180px, calc(100% - 32px));
  margin-left: auto;
  margin-right: auto;
}
.featured-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr;
  gap: 20px;
  margin-top: 20px;
}
.feature-post { padding: 26px; }
.feature-post.large { grid-row: span 2; padding: 36px; }
.feature-post p { color: var(--muted); }

.section { padding: 78px 0 0; }
.section-heading { margin-bottom: 26px; }
.section-heading.split {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.category-card { padding: 24px; }
.category-card p, .category-card li, .post-card p { color: var(--muted); }
.category-card ul { padding-left: 18px; margin-bottom: 0; }

.filter-buttons { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.filter {
  border: 1px solid var(--border);
  background: rgba(255,255,255,.05);
  color: var(--muted);
  border-radius: 999px;
  padding: 9px 13px;
  cursor: pointer;
  font-weight: 800;
}
.filter.active, .filter:hover { background: var(--accent); color: #06101d; }

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.post-card { padding: 24px; min-height: 260px; display: flex; flex-direction: column; }
.post-card p { flex: 1; }
.post-card.hidden { display: none; }

.newsletter {
  margin-top: 88px;
  padding: 34px;
  display: grid;
  grid-template-columns: 1fr .75fr;
  gap: 28px;
  align-items: center;
}
.newsletter p { color: var(--muted); }
.subscribe-form { display: flex; gap: 10px; }
.subscribe-form input {
  width: 100%;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.2);
  color: var(--text);
  padding: 16px;
  border-radius: 16px;
  font: inherit;
}
.subscribe-form button {
  border: 0;
  background: var(--accent);
  color: #06101d;
  font-weight: 900;
  border-radius: 16px;
  padding: 0 20px;
  cursor: pointer;
}

.footer {
  padding: 34px 0 44px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer div { display: flex; gap: 18px; }
.footer a:hover { color: var(--text); }

@media (max-width: 900px) {
  .menu-toggle {
    display: block;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 8px 11px;
    font-size: 1.2rem;
  }
  .nav-links {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: var(--panel);
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 20px;
  }
  .nav-links.open { display: flex; }
  .hero, .featured-grid, .newsletter { grid-template-columns: 1fr; }
  .category-grid, .post-grid { grid-template-columns: 1fr 1fr; }
  .section-heading.split { align-items: start; flex-direction: column; }
  .filter-buttons { justify-content: flex-start; }
}

@media (max-width: 620px) {
  .category-grid, .post-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 54px; }
  .subscribe-form { flex-direction: column; }
  .subscribe-form button { padding: 15px 20px; }
}